Personalized, real-time audio processing

ABSTRACT

An apparatus and method for real-time audio processing employs a gaze detection sensor to detect a direction of a user&#39;s gaze and output a gaze signal corresponding to the detected direction of the user&#39;s gaze. A digital signal processing unit responds to a plurality of signals corresponding to a plurality of sounds received at the apparatus, and the determined direction of gaze to identify a signal of interest from the plurality of signals using the gaze signal. The signal of interest is processed for output to the user. In embodiments, a microphone array provides the plurality of signals. An imaging sensor may work with either the microphone array or the gaze detection sensor to identify the signal of interest.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/906,836, filed on Feb. 27, 2018; which is a continuation of U.S.patent application Ser. No. 15/013,537, filed on Feb. 2, 2016, now U.S.Pat. No. 9,905,244, issued on Feb. 27, 2018; the disclosures of whichare incorporated herein by reference in their entireties.

TECHNICAL FIELD

This application relates generally to the field of audio processing andin particular, sound detection and enhancement.

BACKGROUND

There are many environments where the ability to hear and distinguish acertain noise or sounds from others in the environment is important. Forexample, in a crowded lecture theater, an audience member listening to aspeaker/lecturer may encounter noise from a variety of sources. Thesecould include noise sources inside the theater, such as air conditioningor other ventilation, cellphones of other audience members, peopletalking or shuffling papers during the speaker/lecturer's presentation,and the like. Noise also could come from outside the lecture theater(e.g. traffic, hallway voices, custodians operating cleaning equipment,and the like). In such environments, a listener's ability to discern orhear desired sounds from others can be diminished. In addition, as aspeaker or listener moves about the lecture theater, the soundconditions may change. For example, if the listener is sitting too closeto the speaker, or a set of audio speakers, the sound level may be toohigh. Alternatively, if the listener is too far away from the soundsources, the sound level may be too low. Other noisy environments, suchas parties, busy public streets, and stadiums also present hearingchallenges.

Noise cancellation systems process noise based on existingpre-determined criteria. For example, some systems, such as thoseutilizing automatic gain control, utilize a reference level anddetermine whether a noise signal is above that level. If the noisesignal is not above the reference level, then it is considered unwantednoise and is removed. Such systems do not take into account factorswhich may, for example, make an otherwise low-level signal a desiredsignal.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is illustrated by way of example, and not by wayof limitation, in the figures of the accompanying drawings in which:

FIG. 1 is a diagram depicting an exemplary environment in which areal-time audio processing device may function.

FIG. 2 is a diagram illustrating a real-time audio processing deviceaccording to embodiments.

FIG. 3 is a flow chart illustrating an embodiment of a real-time audioprocessing method.

FIG. 4 is a flow chart illustrating an embodiment of a real-time audioprocessing method.

DETAILED DESCRIPTION

Referring to FIG. 1, according to an embodiment, a real-time audioprocessing device 200 may be located in a lecture hall or theater 101,where a listener may wish to focus on sound coming from aspeaker/lecturer or other sound source 102. The device 200 may be closerto the source 102 than to other sound/noise sources 106, may receive aplurality of sounds 103, some of which may be desired, and some of whichmay be noise. The plurality of sounds may include a desired sound 104,noise 105 from noise sources 106 within a certain vicinity 101 of thespeaker, and/or any other type of noise.

Relative positioning and sound levels in other environments canrepresent similar issues to those encountered in a lecture hall ortheater. Any kind of crowded room, as for example at a party orreception in which two people might wish to converse in a room full ofother conversations and unrelated noise; a busy public street or crowdedpublic transportation vehicle; or even an office with cubicles canpresent listening challenges. In any of the environments listed here,the actual sound source on which the listener wishes to focus may not bethe loudest sound source in the vicinity.

Referring now to FIG. 2, the real-time audio processing device 200 mayinclude a microphone array 201, having one or more microphones 202. Inan embodiment, the microphone array 201 as well as the real-time audioprocessing device 200 may be integrated into a user's headphones.Microphone array 201 detects the plurality of sounds and converts thesounds into a plurality of signals. The position of each microphone 202within the array 201, together with the magnitude of signals coming fromeach microphone, can provide information about directionality and soundlevel. Microphone array 201 then outputs the plurality of signals to asignal processing unit 203 of the real-time audio processing device 200.

In the following discussion, signal processing unit 203 will be referredto as a digital signal processing unit, or DSP unit. DSP chips are knownto be designed, configured, and/or otherwise implemented in a way thatmakes sound processing efficient. However, the techniques and conceptsdescribed herein also may be implemented in a wide range of suitablyprogrammed (micro)processors, (micro)controllers, or other computing orprocessing devices.

In an embodiment, DSP unit 203 may use information about which signalcomes from which microphone 202 in array 201 to determine sounddirectionality and relative level. Using this information, together withthe signals, the DSP unit 203 may determine a magnitude, frequency anddirection of arrival component for each signal within the plurality ofsignals. DSP unit 203 may implement one or more direction findingalgorithms to determine the direction of arrival component of eachsignal. Such algorithms may include, by way of non-limiting example,Time Difference of Arrival, Triangulation, and Particle VelocityMeasurement. Other algorithms will be known to ordinarily skilledartisans. In an embodiment, DSP unit 203 also determines a level ofpersistence for each signal in the plurality of signals. In anembodiment, the DSP unit 203 may determine persistence in either asignal's amplitude, or frequency, or duration, or all three. In thismanner, real-time audio processing device 200 may distinguish betweentransient, sudden, and/or random sounds, on the one hand, and, forexample, speech (which tends to have a certain degree of persistence interms of level and/or duration).

Referring again to FIG. 2, real-time audio processing device 200 mayinclude a gaze detection sensor 204 to determine a direction of theuser's gaze during operation of the real-time audio processing device.The gaze detection sensor 204 may be a gyroscope sensor, accelerometeror any sensor device capable of sensing rotational motion or changes inangular velocity. In this kind of implementation, based on a position ofthe sensor 204 relative to the user's line of sight, movement and/orposition of a user's head may be a surrogate for the user's actual gaze.

In an embodiment, the gaze detection sensor 204 may use technologysimilar to that in Google Glass™, for example, to detect the actualposition of the user's eyes. Technology starting to appear in helmets orgoggles that pilots wear, enabling them to move their eyes to controlaspects of aircraft operation instead of having to move their hands fromthe controls, also could be used. In another embodiment, the gazedetection sensor 204 may use the relative position of the microphones inthe microphone array 201 as placed on the user's head or body, andmovement of the array, to derive information about the direction of theuser's gaze. However, this approach likely would be less reliablebecause the desired sound source on which the listener may be focusingmay not be the loudest source.

In an embodiment, DSP unit 203 may use the user's gaze to determinewhich sound(s) to emphasize or de-emphasize. Where there are multiplesound sources, as for example when talking to someone at a loud partywhere music is playing or other conversations are going on nearby, itmay be that the desired sound (e.g. the speaker with whom the user isconversing) may not be the loudest sound source where the listener ispositioned. Therefore, it may be desirable to be able to emphasize soundcoming from the direction of the speaker, and de-emphasize sound comingfrom other directions. Aspects of embodiments of this approach now willbe discussed.

As the user's gaze (or head or body position) tracks the direction ofthe speaker, the gaze detection sensor 204 may generate a signalcorresponding to the direction of the user's gaze. DSP unit 203 mayconfirm that the direction of the user's gaze corresponds to thedirection of the speaker's location by comparing movement of the array201 or gaze detection sensor 204 relative to sound coming from thedirection of the speaker.

According to an embodiment, the DSP unit 203 may implement any of anumber of algorithms, known to ordinarily skilled artisans, fordetecting and differentiating unwanted noise to supplement the real-timeaudio processing device's sound processing capabilities. By way ofexample only, the real-time audio processing device 200 may utilizeacoustical beam-forming techniques, either as a separate module oralgorithm, or, as depicted in FIG. 2, as module 205 within DSP unit 203.Using acoustical beam-forming is another way to emphasize sound comingfrom one direction, while de-emphasizing sound coming from otherdirections.

In an embodiment, when DSP unit 203 has confirmed that the user's gazeis tracking the speaker or other desired sound source, DSP unit 203 maydetermine whether the user's gaze is continuing to track. For example,using an accelerometer or other motion sensor, DSP unit 203 maydetermine the change in head movement, and/or change in speed of headmovement over the same or different given time interval(s). More than acertain (threshold) amount of movement may indicate a change in focusfrom the speaker to another source. More than a certain (threshold)amount of speed of movement may indicate a head jerk, and not a changein focus. Depending on desired effect, the DSP unit 203 may beinstructed either to heed or to ignore gaze direction shifts that gazedetection sensor 204 registers. Thus, for example, if a user turns,quickly or slowly, to hear another speaker (e.g. someone sitting next tothe user at a lecture), and the user's gaze remains in that otherspeaker's direction for long enough, the DSP unit 203 may determine thatthe user has changed his/her gaze, and can focus on the nearby speaker.

DSP unit 203 can compare the direction of the user's gaze with thedirection of sound arrival as represented by respective signals withinthe plurality of received signals. DSP unit 203 also can compare themagnitude of each signal within the plurality of received signals witheach other to a preset magnitude reference threshold. DSP unit 203 thencan determine which signals from the plurality of received signals havea direction of arrival component that matches the direction of theuser's gaze and which signals have a magnitude that meets or exceeds thepreset magnitude threshold. Signals having a direction of arrivalcomponent that matches the direction of the user's gaze and a magnitudethat meets or exceeds the magnitude threshold may be considered asrepresenting the desired sound, while signals that do not have amatching direction of arrival component or that are not sufficientlypersistent may be considered as representing unwanted noise. If nosignals having a direction of arrival component that corresponds to thedetected direction of the user's gaze, and a magnitude that meets orexceeds the magnitude consistency threshold are detected, then thereal-time audio processing device will restart and attempt to ascertainthe desired sound again. In such an embodiment, sound magnitude may begiven more significance than in other embodiments, in which the user'sgaze is given the most emphasis.

In an embodiment, DSP unit 203 may compare a persistence of each signalwithin the plurality of signals to a persistence threshold. Persistencemay be a function of both amplitude (magnitude) and duration. Signalsthat do not meet the persistence threshold may be considered to beunwanted noise. The factors discussed above, including direction ofarrival, magnitude, and persistence value are exemplary only, and shouldnot be construed as limiting the number of factors the DSP unit 203 cantake into account in determining the desired sound.

In an embodiment, DSP unit 203 may assign weights to the direction ofarrival, magnitude and persistence factors. DSP unit 203 may then takethe weighted sum of all factors for each signal within the plurality ofsignals and compare the sum to a weighted reference factor. If theweighted sum of all factors for any signal within the plurality ofsignals meets or exceeds the weighted reference factor, then DSP unit203 may determine that signal to be the desired sound signal. Signalsnot having a weighted sum that meets or exceeds the respective weightedreference factor may be considered as unwanted noise.

After determining which signal among the plurality of received signalsrepresents the desired sound, DSP unit 203 may remove (cancel) ordeemphasize (diminish) any signals representing unwanted noise. By wayof example only, DSP unit 203 may remove signals representing unwantednoise by capturing a frequency profile of the unwanted noise, invertingthe frequency profile and offsetting it, which provides the opposite ofthe unwanted noise signal. The opposite noise signal is then output toeffectively cancel the unwanted noise. In an embodiment, DSP unit 203could provide additional amplification to the desired sound, andcorrespondingly less amplification to the unwanted noise, thusemphasizing the desired sound as compared to the unwanted noise.

In an embodiment, as depicted in FIG. 2, the real-time audio processingdevice may include an imaging sensor 207 to look for the face of aspeaker. The gaze detection sensor 204 uses the direction of the user'sgaze to determine whether the user is looking at a desired sound sourcewhich may not be the loudest of the sources, but still is desired. Theimaging sensor 207 uses the direction of the speaker's gaze, and maywork with microphones 202 in microphone array 201 to determine that aloudest, desired sound source is coming from a speaker to whom the userwishes to listen. Such an embodiment may be useful where a listenerturns his/her head briefly, for example, to make notes of a lecturer'sremarks. In an embodiment, imaging sensor 207 could work with gazedetection sensor 204 to confirm a sound source direction, as for examplewhen the user and the speaker are looking at each other.

There may be times when it is desirable to override the gaze detectionsensor 204. For example, in a noisy environment, such as a crowdedlecture hall or a moving subway car, it may be useful to lock on to thespeaker as the desired source of sound, even though there will be timeswhen the user will want to look away. In a lecture hall, for example, asnoted earlier, the listener may want to look at his/her notebook,computer, or tablet, or consult some textual source while the lectureris speaking. In a moving subway car, for example, the user may want tolook at a map posted in the car. Looking away in such circumstances maychange the sound source. But if the user can override the gaze detectionsensor, the sound source can remain as is. The override may be temporary(e.g. changing after a short period of time, such as 5-10 seconds), orit may be permanent until the user turns the override off. Such anoverride may be accomplished, for example, via an override switch 208which, while shown within DSP unit 203, may be onboard microphone array201, or associated with gaze detection sensor 204, for the user'sconvenience.

The imaging sensor 207 may be a video sensor or infra-red sensor or anysensor device with similar functionality. In an embodiment, facialrecognition technology, as used in digital cameras and otherapplications, may be used, to the extent that, for example, suchtechnology facilitates viewing of a speaker's eyes. The imaging sensor207 may output signals corresponding to received images to DSP unit 203.DSP unit 203 may monitor the received signals of the imaging sensor 207and may utilize an algorithm, including facial recognition or thermalrecognition or the like, to determine whether a signal or signalsreceived from imaging sensor 207 correspond to an image of a personspeaking in the user's direction. Upon detecting that a person isspeaking in the direction of the user, DSP unit 203 may emphasizesignals coming from that direction, and deemphasize or cancel signalscoming from a different direction (e.g. more than a certain number ofdegrees from a determined virtual centerline running between the speakerand the listener). The real-time audio processing device then mayfurther process the signals coming from the speaker's direction to be atan optimal level by modifying the volume and frequency parameters of thesignals to appropriate volume and frequency parameters as discussedpreviously.

There may be situations, for example, in a noisy room, in which twopeople who want to converse are across the room from each other, withseveral conversations going on in the area between them. If the peoplecatch each other's eye, then imaging sensor 207 and/or gaze detection204 may lock DSP unit 203 in to the speech of the person across theroom, emphasizing that sound to the exclusion of other sound, so thatthe two people can converse, even when they are not next to each other.In this scenario, one person may wish to catch the eye of the personacross the room. To facilitate that being done, the person seeking theattention may ping the person across the room to alert him/her thatattention and/or conversation is desired. The person across the room,upon receiving the ping, may find the person seeking the attention andengage in eye contact. In that event, the real-time audio processingdevice 200 may function as described above. If the person across theroom wishes to ignore the request, s/he may do so, of course.

Pinging may be done in any number of ways, from a signal broadcastbetween devices 200 that each person is wearing/using, to sending asignal using an app on a smartphone or other handheld device, or thelike.

In an embodiment, a user may wish to communicate to a number of peoplein a room, a hall, an auditorium, or the like that s/he wants to have aconversation about something. To achieve that communication, the usermay be able to broadcast a signal, unique to the user or to the user'ssource of sound, to the people in the area. In an embodiment, otherusers' devices 200 may receive the signal, and can respond by lockinginto that signal and hence to the initiator's sound/voice. Also in anembodiment, users may be able to access a list of various potentialimmediately local speakers via a smartphone or tablet app, and mayselect one of those speakers. In that event, the app could communicatethe information to its respective device 200 and thus lock into thatsignal.

According to an embodiment, imaging sensor 207 may function as gazedetection sensor 204. In another embodiment, particularly in a lecturehall or the like, imaging sensor 207 may supplement gaze detectionsensor by assisting the DSP unit 203 to process signals from a speaker,even in a situation in which the user is not looking in the direction ofthe speaker. DSP unit may give gaze detection sensor 204 priority overimaging sensor 207. In this way, when a user is looking at a lecturer,for example, gaze detection sensor 204 can work primarily with DSP unit203 to ensure that the lecturer's speech is processed appropriately.When the user's gaze points downward to take notes, for example, imagingsensor 207 may be given priority. Alternatively, it may be recognizedthat when a user is looking down to take notes, gaze detection sensor204 will show that the user is not looking in a direction from whichsound is coming. In that circumstance, DSP unit 203 may ignore outputfrom gaze detection sensor 204. This would be one way of implementingthe functionality discussed above.

According to an embodiment, DSP unit 203 may be connected to a music orvideo player. Upon determining that there is someone speaking in thedirection of the user, DSP unit 203 may be configured to automaticallypause playback from the music or video player. In this fashion, auser/listener may opt to listen to someone who is speaking to him/herwithout having to fumble for playback controls.

According to an embodiment, if the user/listener is looking at a speakerwhile using the music or video player, it may be possible to have thereal-time audio processing device determine that the user/listener wantsto hear the speaker rather than playback from the music or video player.The device could respond to an audio command, or could use the gazedetection sensor 204 in the DSP unit 203 to instruct the device tosuspend or pause playback so that the user/listener can hear thespeaker.

In an embodiment, it may be desirable to be able to identify a soundsource without the user looking directly at it. For example, in asymphony orchestra, often there are a plurality of different stringinstruments (e.g. violins, violas, cellos, basses), and/or a pluralityof woodwinds (e.g. oboes, bassoons), and/or a plurality of brassinstruments (e.g. trumpet, trombone, saxophone, French horn, tuba),and/or a plurality of percussion instruments (e.g. triangle, bass drum,tympani, snare drum), and/or keyboard instruments (e.g. piano, organ,harpsichord, electronic keyboard, clavier). The listings within thesecategories is not intended to be extensive, but merely to give an ideaof the range of different instruments. Marching bands may have similarranges of instruments.

In one of the just-described scenarios, a listener may want to focus onthe first violinist, or on the second viola (e.g. in the case of afriend or relative playing in the orchestra who is not the concertmasteror the first violinist, who would be more readily identifiable by gaze).Or, there may be a soloist who is none of these things. In suchscenarios, each performer may have metadata associated with him/her,which then would be identifiable with the musical instrument theperformer is playing. If the DSP unit has, for example, a table withthat metadata in it—something that could be downloaded prior to theperformance, either at the concert or beforehand via an app), thenduring the concert, the user could input instruction to focus on theinstrument(s) associated with particular metadata for one or moreinstruments, so that the sound from those instrument(s) would behighlighted.

Referring now to FIG. 3, a method for real-time audio detection andprocessing begins at 301, when the real-time audio processing devicereceives a plurality of sounds and processes them into a plurality ofsignals. At 302, a direction of a user's gaze is determined. At 303, theDSP unit 203 uses the detected gaze to identify which signal(s) withinthe received plurality of signals correspond to desired sound and whichsignal(s) within the plurality of signals correspond to unwanted noise.The process may cycle through as shown at 304 in FIG. 3 until desiredsound is identified successfully. At 305, the unwanted noise signals areremoved or deemphasized using one or more of the algorithms discussedabove. At 306, the desired sounds are processed to bring them intoconformity with preset volume and frequency parameters. Finally, at 307,in an embodiment in which the user is wearing a audio playback device inwhich the real-time audio processing device is incorporated, playbackmay be paused to facilitate the user's hearing the speaker. Each of301-307 may be implemented in accordance with any of the embodiments andtechniques described above with respect to FIG. 2.

FIG. 4 represents a variant of the flow and accompanying description forFIG. 3, taking into account the use of imaging sensor 207 in conjunctionwith gaze detection sensor 204 according to an embodiment. At 401, thereal-time audio processing device receives a plurality of sounds andprocesses them into a plurality of signals. At 402, a direction of aspeaker's gaze is determined. At 403, the DSP unit 203 uses the detectedspeaker's gaze to identify which signal(s) within the received pluralityof signals correspond to desired sound and which signal(s) within theplurality of signals correspond to unwanted noise. At 404, if there isnot a match, a further action may be taken to determine whether imagingsensor 207 should be given priority over gaze detection sensor 204. Asdiscussed previously, one such situation may occur when a listener/useris looking down, for example, to take notes. If the user is not lookingdown, the process may cycle through as shown in FIG. 4 until desiredsound is identified successfully. If the user is looking down, thenpriority may be given to the imaging sensor 207, or to microphone array202, along the lines discussed earlier.

In an embodiment, at 405, there may be processing to determine whetherthe noise cancelling algorithm being implemented is workingsuccessfully, e.g. to see whether sound that is not coming from thespeaker or the desired sound source is being identified successfully. Ifnot, then at 406 the process may be returned to the beginning, as shownin FIG. 4, or to another place in the flow chart, e.g. 402 or 403. Ifthere is sufficient correlation, i.e. if the unwanted sound isidentified correctly, then at 407, the unwanted noise signals areremoved or deemphasized using one or more of the algorithms discussedabove. At 408, the desired sounds are processed to bring them intoconformity with preset volume and frequency parameters. Each of 401-408may be implemented in accordance with any of the embodiments andtechniques described above with respect to FIG. 2.

The elements discussed above with respect to FIGS. 3 and 4 might beinitiated automatically, upon powering up of the real-time audioprocessing device. Alternatively, the device might respond to a suitableuser verbal command. Techniques for responding to user verbal commandswill be known to ordinarily skilled artisans.

The disclosed embodiments are not limited in their applicability tomusic halls, lecture halls, or theaters, or to lecturers or speakers. Ata party or in a crowded room, where multiple speakers may be present inproximity to a listener, some of those speakers being even louder thanthe one to whom a user may wish to listen, the ability to look at aparticular speaker could be helpful in emphasizing that speaker's voiceand cancelling out or de-emphasizing the voices of others, or soundscoming from different directions. Embodiments could be used at sportingevents, subways, public streets, restaurants, or in any environment inwhich directional reception of sound would be helpful.

Although the disclosure has been described with reference to severalexemplary embodiments, it is understood that the words that have beenused are words of description and illustration, rather than words oflimitation. Changes may be made within the purview of the appendedclaims, as presently stated and as amended, without departing from thescope and spirit of the disclosure in its aspects. Although thedisclosure has been described with reference to particular means,materials and embodiments, the disclosure is not intended to be limitedto the particulars disclosed; rather, the disclosure extends to allfunctionally equivalent structures, methods, and uses such as are withinthe scope of the appended claims.

To the extent that method or apparatus embodiments herein are describedas having certain numbers of elements, it should be understood thatfewer than all of the elements may be necessary to define a completeclaim. In addition, sequences of operations or functions described invarious embodiments do not require or imply a requirement for suchsequences in practicing any of the appended claims. Operations orfunctions may be performed in any sequence to effectuate the goals ofthe disclosed embodiments. This is the case, for example, with respectto the operations in FIG. 3, in which, for example, a user's gazedirection might be processed first, rather than processing sounds asshown, as it might be preferable to determine first whether the user'sgaze has focused, and then proceed to process received sound.

The Abstract of the Disclosure is provided to comply with 37 C.F.R. §1.72(b), requiring an abstract that will allow the reader to quicklyascertain the nature of the technical disclosure. It is submitted withthe understanding that it will not be used to interpret or limit thescope or meaning of the claims. In addition, in the foregoing DetailedDescription, various features may be grouped together or described in asingle embodiment for the purpose of streamlining the disclosure. Thisdisclosure is not to be interpreted as reflecting an intention that theclaimed embodiments require more features than are expressly recited ineach claim. Rather, as the following claims reflect, subject matter maybe directed to less than all of the features of any of the disclosedembodiments. Thus, the following claims are incorporated into theDetailed Description, with each claim standing on its own as definingseparately claimed subject matter.

What is claimed is:
 1. An apparatus, comprising: a sensor configured todetect a direction of a gaze of a user and output a first gaze signalcorresponding to the detected direction of the gaze of the user; adigital signal processing unit configured to: receive the first gazesignal from the sensor; receive a second gaze signal; receive a thirdgaze signal; determine a priority for each of the first gaze signal, thesecond gaze signal, and the third gaze signal; select at least one ofthe first gaze signal, the second gaze signal, and the third gaze signalbased on the priority; identify, in an electronic data storage, one ormore available actions that correspond to the selected at least one ofthe first gaze signal, the second gaze signal, and the third gazesignal; select an action from the one or more available actions; andexecute a set of computer-readable instructions that correspond to theaction.
 2. The apparatus of claim 1, further comprising a microphonepositioned relative to a position of the sensor to provide informationindicating directionality of one or more sounds that correspond to thesecond gaze signal.
 3. The apparatus of claim 2, wherein the second gazesignal is selected based on a determination that the detected directionof the gaze of the user that corresponds to the first gaze signal is ina different direction as compared to the one or more sounds thatcorrespond to the second gaze signal, wherein the action is selectedbased on the detected direction of the one or more sounds.
 4. Theapparatus of claim 1, wherein the first gaze signal is associated with afirst priority and the second gaze signal is associated with a secondpriority, wherein when selecting one of the first gaze signal, thesecond gaze signal, and the third gaze signal based on the priority, thedigital signal processing unit is configured to: determine that thethird gaze signal corresponds to an unwanted signal that corresponds toa third priority that has a lower priority than the first priority forthe first gaze signal and the second priority for the second gazesignal; and deemphasize the third gaze signal in view of the thirdpriority having a lower priority than the first priority and the secondpriority.
 5. The apparatus of claim 4, wherein deemphasizing the thirdgaze signal includes removing audio from the third gaze signal.
 6. Theapparatus of claim 1, wherein the digital signal processing unit isfurther configured to determine that a person is speaking in a directionof the user based on one or more of the first gaze signal, the secondgaze signal, and the third gaze signal, wherein the action is selectedbased on a determination that the person is speaking in the direction ofthe user.
 7. The apparatus of claim 1, further comprising an imagingsensor configured to detect an image, wherein the action is selectedbased on the image.
 8. The apparatus of claim 1, wherein the third gazesignal includes an identification signal from a sound source, theidentification signal including metadata that identifies either thesound source itself, or a person associated with the sound source.
 9. Amethod, comprising: receiving a first gaze signal from a sensor;receiving a second gaze signal; receiving a third gaze signal;determining a priority for each of the first gaze signal, the secondgaze signal, and the third gaze signal; selecting at least one of thefirst gaze signal, the second gaze signal, and the third gaze signalbased on the priority; identifying, in an electronic data storage, oneor more available actions that correspond to the selected at least oneof the first gaze signal, the second gaze signal, and the third gazesignal; selecting an action from the one or more available actions; andexecuting a set of computer-readable instructions that correspond to theaction.
 10. The method of claim 9, further comprising receivinginformation indicating directionality of one or more sounds thatcorrespond to the second gaze signal.
 11. The method of claim 10,wherein the second gaze signal is selected based on a determination thata detected direction of a gaze of a user that corresponds to the firstgaze signal is in a different direction as compared to the one or moresounds that correspond to the second gaze signal, wherein the action isselected based on the detected direction of the one or more sounds. 12.The method of claim 9, wherein the first gaze signal is associated witha first priority and the second gaze signal is associated with a secondpriority, wherein selecting one of the first gaze signal, the secondgaze signal, and the third gaze signal based on the priority includes:determining that the third gaze signal corresponds to an unwanted signalthat corresponds to a third priority that has a lower priority than thefirst priority for the first gaze signal and the second priority for thesecond gaze signal; and deemphasizing the third gaze signal in view ofthe third priority having a lower priority than the first priority andthe second priority.
 13. The method of claim 12, wherein deemphasizingthe third gaze signal includes removing audio from the third gazesignal.
 14. The method of claim 9, further comprising determining that aperson is speaking in a direction of a user based on one or more of thefirst gaze signal, the second gaze signal and the third gaze signal,wherein the action is selected based on a determination that the personis speaking in the direction of the user.
 15. The method of claim 9,further comprising detecting an image, wherein the action is selectedbased on the image.
 16. The method of claim 9, wherein the third gazesignal includes an identification signal from a sound source, theidentification signal including metadata that identifies either thesound source itself, or a person associated with the sound source.
 17. Anon-transitory machine-readable medium having stored thereonmachine-readable instructions executable to cause a machine to performoperations comprising: receive a first gaze signal from a sensor;receive a second gaze signal; receive a third gaze signal; determine apriority for each of the first gaze signal, the second gaze signal, andthe third gaze signal; select at least one of the first gaze signal, thesecond gaze signal, and the third gaze signal based on the priority;identify, in an electronic data storage, one or more available actionsthat correspond to the selected at least one of the first gaze signal,the second gaze signal, and the third gaze signal; select an action fromthe one or more available actions; and execute the action.
 18. Thenon-transitory machine-readable medium of claim 17, wherein the secondgaze signal is selected based on a determination that a detecteddirection of a gaze of a user that corresponds to the first gaze signalis in a different direction as compared to one or more sounds thatcorrespond to the second gaze signal, wherein the action is selectedbased on the detected direction of the one or more sounds.
 19. Thenon-transitory machine-readable medium of claim 17, wherein the firstgaze signal is associated with a first priority and the second gazesignal is associated with a second priority, wherein the operation toselect one of the first gaze signal, the second gaze signal, and thethird gaze signal based on the priority includes: determine that thethird gaze signal corresponds to an unwanted signal that corresponds toa third priority that has a lower priority than the first priority forthe first gaze signal and the second priority for the second gazesignal; and deemphasize the third gaze signal in view of the thirdpriority having a lower priority than the first priority and the secondpriority.
 20. The non-transitory machine-readable medium of claim 17,the operations further include determine that a person is speaking in adirection of a user based on one or more of the first gaze signal, thesecond gaze signal and the third gaze signal, wherein the action isselected based on a determination that the person is speaking in thedirection of the user.